Thomas bearman



Patehted Nov. 29, I898. T. BEARMAN.

LUMBER CIRCULAR SAW MACHINE.

(Applic ation filed Dec. 27. 1897.)

(No Model.)

52 M I f Mlnepgep. C a a [nVeuZarz U ITED STATES PATENT OFFI E.

THOMAS BEARIWIAN, OF OWEN SOUND, CANADA.

LUMBER CIRCULAR-SAW MACHINE.

SPECIFICATION forming part of Letters Patent No. 614,924, dated November29, 1898. Application filed m r 27, 1897. Serial No 663,576. (No model.)

To all whom it may concern.-

Be it known that LTHOMAS BEARMAN, manufacturer, of the town of OwenSound, in the county of Grey, in the Province of Ontario, Canada, haveinvented certain new and useful Improvements in Lumber Circular-SawMachines, of which the following is a specification.

My invention relates to improvements in lumber circular-saw machinesmore particularly adapted for the sawing of logs; and the object of theinvention is to design a simple, compact, economical, and efficient formof ma chine by which a thin small saw may be utilized for the sawing oflogs in various ways and a great saving in timber and power therebyeffected; and it consists, essentially, of a suitable stationary frameprovided with a swinging frame, at the front of which the saw is heldflush 011 the end of cross-shaft, which derives motion from a belt fromthe main driving-shaft, the swinging frame being adjusted, preferably,by means of screw-spindles deriving movement through a bevel-gearand'shaft and belt from the main shaft and the log being turned and fedand the parts otherwise constructed and arranged in detail, ashereinafter more particularly explained.

Figure 1 is a perspective view of my improved circular-saw machine. Fig.2 is an enlarged detail of the saw and adjacent cutter and means foradjusting same. Fig. 3 is an enlarged sectional perspective detail ofthe joint at the top of the screw-spindles. Fig. 4 is a detail of thetrunnions through which the screw-spindles pass. Fig. 5 is a detail ofthe hollow trunnions upon which the swinging frame is pivoted. Figs. 6,7, 8, 9, 10, 11, and 12 are end views of logs, showing the various cutswhich may be accomplished by my circular-saw machine.

In the drawings like letters and numerals of reference indicatecorresponding parts in each figure.

A A are the side bars of the frame. the end bar.

B B are the vertical standards, and O is the crossbar at the top of theVertical standards.

A is a cross-bar extending between the side bars A.

A is a bar extending from the cross-bar A to the end bar A,

A is

which are pivoted on the trunnions E E.

F is a cross-bar connecting the swinging side bars F.

G G are trunnions secured to the outer ends of the side bars F F and tothe inside of the bars and formed similarly to the trunnions E E.

H is a supplemental swinging frame provided with sidebars H and anextended end bar H which is provided with a jaw h, the members of whichextend to each side of the saw I, so as to steady it, the saw beingshown in dotted lines in Fig. 1.

J isthe saw-shaft, which is suitably supported in journals j on the endof the side bars F of the swinging frame, such shaft extending throughthe hollow trunnions G. The end of one side bar H of the supplementalframe II is provided with a handle it and has a spring-plunger connectedto such side bar which is designed to be brought into engagement withone or other of the notches of the quadrant g, attached to the end ofthe side bar, so as to adjust the supplemental frame II to any desiredlevel, whereby the jaws 7L may be brought into proper central positionnear the cutting edge of the saw.

K is a pulley (shown mostly in dotted lines) secured to the shaft J.

L is a pulley secured to the main shaft. The pulleys K and L areconnected together by a belt Z.

M is an open frame pivoted on the studs m, journaled in thebearing-brackets m.

N and N are spindles journaled in suitable bearings in the sides of theframe M, and n and n are pulleys which are suitably held in frictionalcontact with each other.

11. is a pulley journaled on the shaft N, adj acent to the pulley n.

O are screw-spindles, one only of which is shown, extending and screwedthrough the trunnions o,pivotally held in bearing-brackets O, secured onthe side bars F of the swinging frame. The bearing-brackets O areprovided with slots 0', so as to allow of a limited swinging movement ofthe screw-spindles O. The side bars F are also slotted for this purpose.

P are ways, preferably of metal in arc-shape form, secured to the sideof the standards B B, one only being shown, but the other is at theopposite side of the far standard. P are bearing-blocks which rubagainst such ways and hold the swinging frame from lateral vibration.

The upper ends of the screw-spindles O are provided with bevel-pinions 0which are suitably secured onto thespindles and balls 0 which havehearings in sockets Q, formed at the center of the top of thebearing-brackets Q, as indicated.

R is a counter-shaft supported in suitable bearings r, secured in thetop of the crossbar 0 and provided at the end with bevelpinions R, whichmesh with the bevel-pinions 0 at the upper end of the screw-spindles 0.As the pulley and socket at the top of the spindles O are directly inline with the center of the shaft B, it will be readily seen that thebevel gea-r-pinions O and R will mesh perfectly with each other nomatter in what position the screw-spindles 0 may be swung.

S is a pulley secured on the rod R, connected by a belt 8 to the pulleyn on the spindle N.

T is a lever pivoted on the quadrant-frame t, designed to mesh with oneof the three notches t of the quadrant. The quadrantframe T is securedat the base by suitable bolts to the flooring or frame of the buildingin proximity to the supplemental swinging frame 11. The lower end of thelever T is pivotally connected to a rod T, which is connected at theopposite end to the lower end of the frame M.

U is a pulley secured on the main drivingshaft D opposite the pulleys nand n. In the position in which the lever T is shown in the drawingsthatis, in the front notch of the quadrant If-the pulley N is brought infrictional contact with the pulley U on the main shaft. By throwing thelever T opposite the second notch both pulleys n and n are disconnectedfrom the shaft. By bringing the lever Topposite the nearest notch shownin the drawings the lower pulley n is thrown against the pulley U. Nowas the pulley U is located on the driving-shaft it will be seen that ifthe pulley m is against the pulley U the drivingshaft, revolving in thedirection indicated by arrow, will impart motion to the pulley n and ncausing the belt S to move in the direction indicated by arrow andcommunicating motion to the bevel-pinion 0 in the direction indicated byarrow, thereby raising the swinging frame on account of thescrew-spindles 0 being caused to move downwardly through the trunnionso.hen the pulley n is brought against the pulley U on the main shaft, suchpulley n will cause the pulley n to rotate in the opposite direction,and consequently drive the pulley S in the opposite direction, andconsequently the spindles 0, thereby causing the screw-spindles to passupwardly through the trunnions 0, and consequently lowering the swingingframe. It will thus be seen that by manipulating the lever T theswinging frame may be raised and lowered to any desired position, andtherebybrin g the saw either above or below the log 2, which is held ona carriage 3, longitudinally movable on a track a. By throwing out bothfrictionpulleys 'n and n the swinging frame will of course remainstationary and hold the saw so. The supplemental frame H may be alsoadjusted so as to bring it level, and consequently the jaws 7t,substantially on a line with the horizontal plane of the saw whencutting.

The log 2 is held in lathe-points 5, supported in the brackets 6 on thecarriage. A quadrant 7 is also provided with equidistant notches, withwhich a lever 8 is designed to coact, such lever being removably securedon the square end of the lathe-point and pro vided with a spring-plunger9, designed to be brought into engagement with the notches in thequadrant. relation to the quadrant the log is simultaneously turned andheld in any desired position for the various ways of sawing logs, suchas indicated in Figs. 6 to 12, in which Fig. 6 shows, diagrammatically,the saw in position for trimming the log. Fig. 7 shows the position thesaw assumes to cut clapboards; Fig. 8, an octagonal cut; Fig. 9, a cutinto the center of a large log, the saw be- -ing intended to be raisedinto the upper positi on and lower position to effect the cutting of thelumber in this manner; Fig. 10, a quarter-cut; Fig. 11, sawing the loginto boards by giving four turns to the log and by sawing from above orbelow, and Fig. 12 another alternative form.

In turning the log around of course the lever 9 would have to be movedfrom the square end of the lathe-point, so as to completely turn thelog.

In Fig. 2 I show the saw supported on the end of the disk 10, to whichit is bolted by countersunk bolts, the outside of the saw being flush.Suitable cutters 11 are provided in proximity to the saw secured inposition within notches in collars 12, which are located on the hub 13and through which the key 14 extends. The collar 15 is provided with acircumferential groove, such collar being secured to the cutter-collars.16 is a lever pivoted at 17 and having a pin 18 extending into a groovein the collar 15. By swinging the lever the cutters may be movedlongitudinally on the hub out of position, so they will not operate.Ordinarily these cutters are used to trim the rough outside edge of thelog.

By adjusting the lever in From this description it will be seen that Iam enabled to use in a machine such asI describe a very small and thinsaw and to out small or large logs, whether rough or smooth, in variousways. Formerly such logs were cut by very large thick saws, andconsequently a great deal of the lumber was wasted in sawdust. By mymachine this is entirely avoided. It will also be understood that onaccount of using the small saw I can effect a great saving of power. Onaccount of the compactness of my machine it may be also readily movedfrom place to place.

What I claim as my invention is 1. In combination, the main frame, theswinging frame, the main drive-shaft, the saw, the standards, thecross-piece supported thereby, the supplemental shaft supported therebydriven from the main drive-shaft, a bevel-gear fixed to the supplementalshaft, a

bracket extending transversely of said crosspiece having a socket inline with the end of the supplemental shaft, a screw-spindle ha"- ing abulbous head held in said socket, a gear carried thereby meshing withthe first gear and a pivotal screw connection between said screw-spindleand said swinging frame, substantially as described.

2. In a lumber-sawing machine, in combination a suitable frame, aswinging frame, a saw located at the outer end thereof on the end of asuitable shaft, suitable uprights supported on the frame suitablebearings on the side bars of the swinging frame slots in the bearings,screw-spindles screwed through the trunnions bevel-pinions at the upperends of the screw-spindles, a ball-and-socket hearing for the upper endof the screw-spindles, a counter-shaft provided with bcvel-pinionsmeshing with the bevel-pinions at the upper end of the screw-spindles,the pulley on the counter-shaft, the pulley on the main shaft, the minorswinging frame having two spindles with abutting friction-pulleys, asupplemental pulley on one of the spindles of the abuttingfriction-pulleys and a belt connecting such supplemental pulley to thepulley on the counter-shaft as and for the purpose specified.

. 3. The combination with the stationary frame and swinging frame theshaft supported in suitable hearings on the end of the swinging frame,the saw secured on the end of the shaft, the hollow trunnions secured tothe inside of the side bars of the swinging frame and through which thesaw-shaft extends, the supplemental frame having the side bars pivotallyswung on the outside of the hollow trunnions through which the sawshaftextends, the end extension-bar of the supplemental frame provided withjaws, the handle end of one of the 'side bars of the frame, the quadranton the side bars of the swinging frame in proximity to the saw-shaft andthe springpressed plunger coacting therewith and operated from thehandle on the end of the side bar as and for the purpose specified.

4. In combination the main frame, the uprights, the screw-spindleextending through the side bars of the swinging frame, thebevel-pinions, the counter-shaft, pulley on the counter-shaft, thepivotally-supported pulley-frame provided with abutting frictionpulleysjournaled on the spindles, the supplemental pulley on the same spindleas one of the friction-pulleys, the pulley connecting the supplementalpulley to the pulley on the counter-shaft, the main shaft andfrictionpulley thereon, the rod connected to the lower end of thepiVotally-supported pulleyframe, the lever connected to the forward endof the rod in proximity to the supple mental swinging frame and anindependent notched quadrant-frame suitably supported and on which suchlever is pivoted and with which it is designed to coact as and for thepurpose specified.

5. In a lumber-sawing machine, the combination with the saw secured onthe end of the saw-shaft with the outer face flush, of the cutters onthe inside of the saw held in position by suitable collars, a groovedcollar to the outside having longitudinal movement on a key, a lever andpin extending into the groove on the collar for throwing the cutterslaterally upon the shaft as and for the pur pose specified.

THOMAS BEARMAN. Witnesses:

B. BOYD, A. MOADAM.

